About DayDuel

DayDuel makes small daily puzzle games. Each game has one new puzzle a day, the same for everyone, and takes a couple of minutes. You can play for free, without an account, on any phone or computer.

Our games

Ballpark: five estimation questions a day. How tall, how far, how many? Get within 10% for a bullseye.

LinkUp: twelve tiles hide four groups of three, and one fake link that looks like a group but isn't.

How we work

New puzzles go live at midnight UTC. Facts in Ballpark come with their sources, and photos are credited with their licences. Your results stay in your own browser; we only count visits anonymously, without cookies.

DayDuel is made by the team at Cyber Ocean. We care about puzzles that are quick to play, fair to everyone and worth coming back to tomorrow.

Get in touch

Ideas for a puzzle, a fact we got wrong, or a bug: see Contact.